Discover the Facts: The Old Testament S.O.A.P Bar for Ultimate Cleansing

The use of soap for personal hygiene may not have been prevalent before the Christian era.

There are two mentions of soap in the Old Testament. Jeremiah says, "Even if you wash with Niter, and take much soap, your iniquity is marked before me." A more modern translation reads: "Even if you wash with soda and lavish soap." There are doubts about whether this is a reference to true soap, as it has been suggested that it might be lye made by mixing alkaline plant ash with water, or possibly a kind of Fuller's earth.

This view is perhaps supported by the second mention in the book of Malachi, where both the authorized edition of 1611 and modern translations read almost identically: "He is like a refiner's fire, which a fuller's soap."

It has been suggested that one form of soap, made by boiling fats with ashes, was made in Babylon as early as 2800 BC, but was probably only used for washing clothes. Pliny the Elder (7 BC–53 AD) mentions that the Phoenicians made soap from tallow and beech ashes in 600 BC.

In ancient times, perfumed oils were widely used for bathing and were combined with a tool called a strigil, which was used to scrape the skin free of oil and dirt. It is believed that the Romans used a type of clay called "sapo," found near Rome, to wash themselves, from which the word "soap" is derived. Another theory is that the Romans learned the art of soap-making from the Celts, who called it "saipo," using animal fat or vegetable ash. The use of soap in personal hygiene doesn't seem to have been widely adopted until the second century when the physician Galen (130–200 AD) mentioned its use for washing the body.

While soap was in use during the Roman period, its adoption was slow, despite the popularity of public and private baths throughout the empire. The remains of what could have been a soap factory were discovered in Pompeii, which was overwhelmed by an eruption of Vesuvius in 79 AD.

Early Centers of Soap Making

Little is known of the use of soap in the Dark Ages that followed the fall of Rome. The manufacture of soap in Europe and the Mediterranean was revived in the late first millennium. The early centers of production were Marseille in France and Savona in Italy. In Britain, references began to appear in literature from around 1000 AD, and in 1192 the monk Richard Devizes referred to the number of soap makers in Bristol.

Chemistry of Soap

Glycerin was first observed by the Swedish chemist Scheele in 1779. The great French chemist Michel Eugène Chevreul later identified it as the common denominator of fat and called it "glycerine." He showed that oils and fats are glycerides, and that boiling with caustic soda or caustic potash formed salts of fatty acids — or soaps — liberating the glycerine. This knowledge paved the way for the great extension of soap manufacturing in the 19th century.

The traditional method of manufacturing soap involves boiling oils and fats with a caustic solution in open pans, followed by the addition of salt or brine to separate the soap from lye. Modern soap manufacturing processes are continuous and supported by instrumentation and automatic control systems.

Soap & Bathing in the Bible: Scripture, Cleansing, and Purity

Throughout the Bible, cleansing — both physical and spiritual — is a recurring and powerful theme. Water, oil, and cleansing agents appear across both the Old and New Testaments as symbols of purification, renewal, and holiness.

Key Bible Passages on Cleansing & Soap

• Jeremiah 2:22 — "Although you wash yourself with soap and use an abundance of cleansing powder, the stain of your guilt is still before me," declares the Sovereign Lord. This verse uses soap as a metaphor for the impossibility of washing away sin through human effort alone.
• Malachi 3:2 — "But who can endure the day of his coming? Who can stand when he appears? For he will be like a refiner's fire or a launderer's soap." Here, soap symbolizes divine purification — a refining process that removes impurity.
• Psalm 51:2 — "Wash away all my iniquity and cleanse me from my sin." David's prayer of repentance uses the language of bathing and cleansing as spiritual restoration.
• Isaiah 1:16 — "Wash and make yourselves clean. Take your evil deeds out of my sight; stop doing wrong." A direct call to both physical and moral cleanliness.
• John 13:10 — "Jesus answered, 'Those who have had a bath need only to wash their feet; their whole body is clean.'" Jesus uses the act of bathing as a teaching moment on spiritual wholeness.
• Ephesians 5:26 — "...cleansing her by the washing with water through the word." Bathing imagery is used to describe spiritual sanctification.

The S.O.A.P. method of Bible study — Scripture, Observation, Application, Prayer — mirrors this ancient tradition of cleansing. Just as soap purifies the body, meditating on Scripture purifies the mind and spirit. Our handcrafted natural soaps are inspired by this timeless connection between physical cleansing and spiritual renewal.

Natural Soap Comparison: Which Bar Is Right for You?

Not all soaps are created equal. Here's a quick guide to help you choose the best natural bar for your skin type and bathing ritual:

Frequently Asked Questions (FAQ)

What does soap symbolize in the Bible?

In the Bible, soap is used as a powerful metaphor for purification — both physical and spiritual. In Jeremiah 2:22, soap represents the futility of trying to cleanse oneself of sin through human effort. In Malachi 3:2, it symbolizes God's refining and purifying power. The recurring theme is that true cleansing — of body and soul — comes from a higher source.

What is the S.O.A.P. Bible study method?

S.O.A.P. stands for Scripture, Observation, Application, and Prayer. It's a simple four-step method for engaging deeply with the Bible: read a passage (Scripture), note what stands out (Observation), consider how it applies to your life (Application), and close with Prayer. It's a daily practice that cleanses the mind just as soap cleanses the body.

Did people use soap in Biblical times?

Yes, though not in the form we know today. Ancient peoples used alkaline plant ash, Fuller's earth (a type of clay), and animal fat-based compounds for cleansing. True saponified soap — made by boiling fats with alkali — is believed to have originated in Babylon around 2800 BC. The Biblical references to "soap" likely refer to these early cleansing agents.

What is Castile soap and why is it historically significant?

Castile soap is a hard, white soap made from 100% olive oil, originating in the Castile region of Spain. It is considered one of the earliest true soaps and was prized for its purity and mildness. It remains one of the most gentle and skin-friendly soaps available today, making it ideal for sensitive skin and babies.

What makes handcrafted natural soap better than commercial soap?

Commercial soaps are often detergent-based and strip the skin of its natural oils. Handcrafted natural soaps retain glycerin — a natural byproduct of saponification — which is a powerful humectant that draws moisture to the skin. Natural soaps also use plant-based oils, botanical butters, and essential oils that nourish rather than irritate the skin.

How should I store my natural handcrafted soap bar?

Keep your bar on a well-draining soap dish away from direct water spray. Allow it to dry between uses. Natural soaps last longer when kept dry — a properly cured bar can last 4–6 weeks with daily use. Store unused bars in a cool, dry place out of direct sunlight.

Are your soaps safe for sensitive skin?

Yes. Our soaps are formulated with plant oils, botanical butters, and skin-safe essential oils. We do not use synthetic fragrances, parabens, sulfates, or artificial dyes. For very sensitive skin, we recommend our Castile Olive Oil or Oatmeal & Honey bars. Always patch-test a new soap on a small area of skin first.

Do you offer soaps for gifting or bulk purchase?

Absolutely! Our soaps make beautiful, meaningful gifts — especially for those who appreciate natural, handcrafted products with a rich history. We offer gift sets, bundle packs, and wholesale pricing for bulk orders. Contact us for custom orders or church/ministry gifting packages inspired by the Biblical cleansing tradition.

What is the difference between cold-process and hot-process soap?

Cold-process soap is made by mixing oils and lye at room temperature, then allowing it to cure for 4–6 weeks. This method preserves more of the natural properties of the oils. Hot-process soap is cooked, which speeds up saponification and results in a rustic, ready-to-use bar sooner. Both methods produce genuine, glycerin-rich natural soap.

Why is glycerin important in natural soap?

Glycerin is a natural byproduct of the soap-making process. It is a humectant — meaning it attracts moisture from the air to your skin — making it deeply hydrating. Commercial soap manufacturers often extract glycerin to sell separately for use in lotions and cosmetics. In handcrafted natural soap, the glycerin remains in the bar, giving your skin a noticeably softer, more moisturized feel after washing.